    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
            "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
        h4与h5在申明上有区别
    </body>
    </html>